12681601 has 2 divisors, whose sum is σ = 12681602. Its totient is φ = 12681600.

The previous prime is 12681593. The next prime is 12681619. The reversal of 12681601 is 10618621.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 7017201 + 5664400 = 2649^2 + 2380^2 .

It is a cyclic number.

It is not a de Polignac number, because 12681601 - 2³ = 12681593 is a prime.

It is not a weakly prime, because it can be changed into another prime (12681631) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (7) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 6340800 + 6340801.

It is an arithmetic number, because the mean of its divisors is an integer number (6340801).

Almost surely, 2^12681601 is an apocalyptic number.

It is an amenable number.

12681601 is a deficient number, since it is larger than the sum of its proper divisors (1).

12681601 is an equidigital number, since it uses as much as digits as its factorization.

12681601 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 576, while the sum is 25.

The square root of 12681601 is about 3561.1235586539. The cubic root of 12681601 is about 233.1979321007.

The spelling of 12681601 in words is "twelve million, six hundred eighty-one thousand, six hundred one".